CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
87.1%
Successful exploitation of these vulnerabilities may allow an attacker to create a denial-of-service condition, to perform remote code execution, or to access restricted files.
The following CODESYS V3 runtime systems, all versions prior to 3.5.14.10, containing the web server (CmpWebServer) are affected:
In CODESYS V3, the web server is an optional part of the CODESYS runtime system.
Specially crafted http or https requests may allow an attacker access to files outside the restricted working directory of the controller.
CVE-2019-13532 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Specially crafted http or https requests could cause a stack overflow, which may create a denial-of-service condition or allow remote code execution.
CVE-2019-13548 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
Ivan Cheyrezy of Schneider Electric reported this vulnerability to 3S-Smart Software Solutions GmbH.
3S-Smart Software Solutions GmbH has released Versions 3.5.12.80, 3.5.14.10, and 3.5.15.0 to resolve the vulnerabilities for the affected CODESYS products.
Please visit the CODESYS update page for more information on how to obtain the software update: https://www.codesys.com/download/
Updating to Version 3.5.14.10 or higher is recommended over Version 3.5.12.80, which does not resolve the vulnerabilities for all affected products. Further details from 3S-Smart Software Solutions GmbH can be found in a security report at the following link:
<https://www.codesys.com/fileadmin/data/customers/security/2019/Advisory2019-01_CDS-64543.pdf>
As part of a security strategy, 3S-Smart Software Solutions GmbH recommends the following general defense measures to reduce the risk of exploits:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13532
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13548
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-255-01
customers.codesys.com/fileadmin/data/customers/security/CODESYS-Security-Whitepaper.pdf
cwe.mitre.org/data/definitions/121.html
cwe.mitre.org/data/definitions/22.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=3S-Smart%20Software%20Solutions%20GmbH%20CODESYS%20V3%20Web%20Server+https://www.cisa.gov/news-events/ics-advisories/icsa-19-255-01
www.codesys.com/download/
www.codesys.com/fileadmin/data/customers/security/2019/Advisory2019-01_CDS-64543.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
www.instagram.com/cisagov
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www.oig.dhs.gov/
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=3S-Smart%20Software%20Solutions%20GmbH%20CODESYS%20V3%20Web%20Server&body=www.cisa.gov/news-events/ics-advisories/icsa-19-255-01
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
87.1%